期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 10, 页码 7171-7179出版社
AMER CHEMICAL SOC
DOI: 10.1021/am500198y
关键词
graphitized polyacrylonitrile; graphitic carbon nitride; electron transfer channel; photocatalysis; H-2 evolution
资金
- National Natural Science Foundation of China [21271055]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QAK201304]
Novel composites consisting of graphitized polyacrylonitrile (g-PAN) nanosheets grown on layered g-C3N4 sheets were synthesized through a facile one-step thermal condensation of PAN and melamine for the first time. Photoluminescence spectroscopy and the photoelectrochemical measurements reveal that g-PAN nanosheets act as effective electron transfer channels to facilitate charge carrier separation in g-PAN/g-C3N4 composites. The g-PAN/g-C3N4 composites exhibit significantly enhanced visible-light photo-catalytic performance for H-2 evolution over pristine g-C3N4. The 5.0 wt % g-PAN/g-C3N4 composite has optimal H-2 evolution rate of 37 mu mol h(-1), exceeding 3.8 times over pristine g-C3N4. We have proposed a possible mechanism for charge separation and transfer in the g-PAN/g-C3N4 composites to explain the enhanced photocatalytic performance.
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